Improvement in fire-extinguishers



A. s. Donn a 1. c. ANDREWS.

FIRE EXTINGUISHER.

Patented Nov.7.1876.

maman UNITED STATES PATENT Q'EEICE.A

AMZI s. DODD AND IsAAC C. ANDEEws, OE NEw YOEK, N. Y., AssIeNoEs To HOMEFIRE EXTINeUlsnEE COMPANY, OE sAMEPLACE..

IMPROVEMEv-NTIN FIRE-EXTINGUISHERS.

Specification forming part of Letters Patent No. 184,067, dated November7, 1876 application led April 18, 1876.

detail horizontal section ofthe same taken through the line :r x, Fig.1.

The object of our invention is to improve the construction offire-extinguishers to enable the gas-generatin g ingredients to be readily introduced, kept separate for any desired length of time, and thenbrought together,

when required, by mechanical means applied;

from the outside of the vessel.

The invention will first be described in connection with drawing, andthen pointed out in the claims.

In the drawing, A represents the can or cylinder of a fire-extinguisher,inthe top of which is formed a hole, into which is inserted, from theinside of the said can or vessel, a female screw,.]3. The screw B has anOutwardly-projecting flange formed around its inner end, which restsagainst, and is soldei-ed to or otherwise secured to, the topo' the canor vessel A, against which it rests. U is a male screw, lwhich' screwsinto the screw B, and has a packing placed around it, which is pressedagainst the outer end ot' the screw B, as shown in Fig. 1. To the topofthe male screw C are attached, or upon it are formed, arms or leverhandles D for convenience in'turning it in and out. To the top oi' themale screw C, upon the outer side, is attached a dome, E, and to saidtop, upon the inner side, is attached an inverted cup, F.

One ofthe parts E F may have a neck formed upon it to pass through ahole in the top of the male screw C, and screw into the outer side ofsaid parts,clamping the said top between them 5 or the three parts maybe connected in any other convenient and substantial manner.

The inverted cup F may be formed solidly with the top of the screw C,and in the form of a downwardly-projecting ange, if desired. The lowerpart or mouth of the cup F is cylindrical to tit into the' upper end ofthe rack 0r cage G, and has a ring-flange formed upon it to limit theupward movement of the said cage, and has lugs formed upon it to' enterright-angled slots in the upper part of the cage G, so as to secure thesaid cage to its supporting-cup by a bayonet-catch.` H is a stem orshaft, which passes up through the top of the screw C, and through thetop of the dome E, and has a screw-thread cut upon its upper part to itinto a screw-thread cut in the hole in the top of the dome E. To thelower end of the stein H, within the vcup F, is

attached a bell, I, to fit over the neck ot' a bottle, J, and rest uponor near the shoulders of said bottle. The bottom of the bottle J restsupon a boss, K, formed upon the bottom of the cage G,.or upon a smallplate placed upon said bottom, so as to break the said bottle as thebell I is pushed down against it, by turning the stem H downward. lhestein H is turned downward by a leverhandle, L, attached to its upperend, and is again raised when the lever-handle L is released by a springconnected with said stein and secured in the dome E. This spring is notshown in the drawing.

This construction renders it impossible to break a charged bottle whenplacing it in place from forgetting to raise thesteunH and bell I afterbreaking a bottle. Packing is placed between the bell I and the cup F,and between the cup F and the top of the screw G, to prevent any fumesor vapors from escaping through said joint.

Having thus described our invention, what we claim as new, and desire tosecure by Letters Patent, is-

l. The combination of the female screw B,

provided with a flange upon the'outer side of its inner end, and themale screw C, provided with a lever-handle, D, and a dome, E, with thetop of a can or vessel, substantially as herein shown and described.

2. The combination, with internally-threaded dome E, threaded stem H,and lever L, of the bell I, bottle J, and convex-bottomed cage G K,substantially as and for the purpose specified.

' AMZI S. DODD.

ISAAC G. ANDREWS.

. Witnesses:4 l

J AMES T. GRAHAM, ALEX. F. ROBERTS.

